The reputable companies that sell glandular products over the internet are very expensive. It is likely that a prescription would be less expensive than products that are made and sold by small companies. Several years ago I went to a naturopathic doctor to find out if she might be able to provide me with better quality care/products, but she was extremely expensive and so were the products that she sells. Some companies that sell glandulars will only do so to people who are under the care of a naturopathic physician. I do not remember the name of the company that the naturopath used for glandulars. Some natural food stores might still sell glandulars, though the one that I know of in my locale quit selling them years ago.